Sulphur - Woolmith Quarry, Maybee, Michigan

Still using the Science-Surplus spectrometer with the Labram microscope
because of difficulties with the Labram spectrograph**. 

Here's the third specimen we've measured (another easy one for 633nm recommended
by jm-derochette). Sulfur:





raw data (.csv)

RRUFF Sulphur





A more recent scan with the rebuilt Labram Aramis: